## CM252016-R33M: Component Overview The **CM252016-R33M** is a surface-mount (SMD) wire-wound chip inductor. It is commonly used in high-frequency circuits for filtering, impedance matching, and resonance. ### 1. Part Number Breakdown Understanding the alphanumeric code helps identify the component's physical and electrical characteristics: | Code Segment | Meaning | Description | | :--- | :--- | :--- | | **CM** | Series Prefix | Typically designates a Wire-wound Chip Inductor. | | **252016** | Case Size (EIA) | Dimensions: 2.5mm x 2.0mm x 1.6mm. | | **R33** | Inductance Value | R represents a decimal point. **0.33 µH**. | | **M** | Tolerance | **±20%** (Standard industry code). | --- ### 2. Key Electrical Specifications Below are the typical technical parameters for this specific part: | Parameter | Value | | :--- | :--- | | **Inductance** | 0.33 µH | | **Tolerance** | ±20% | | **Test Frequency** | ~25.2 MHz | | **DC Resistance (Max)** | ~0.45 Ω | | **Rated Current (Max)** | ~450 mA | | **Self-Resonant Frequency (Min)** | ~450 MHz | | **Operating Temperature** | -40°C to +125°C | --- ### 3. Physical Construction and Features * **Wire-Wound Core:** The part consists of a copper wire wound around a ceramic or ferrite core. This construction allows for higher Q-factors (Quality) and higher current handling compared to multilayer inductors. * **Terminations:** Usually features gold or tin-plated electrodes for excellent solderability and resistance to heat. * **Form Factor:** The 2520 (Metric) size corresponds to the 1008 (Imperial) size, making it suitable for compact PCB designs. --- ### 4. Common Applications * **Mobile Devices:** Power management and RF stages in smartphones. * **Filtering:** Used in LC filters to suppress high-frequency noise. * **Communication:** Impedance matching in Bluetooth, Wi-Fi, and GPS modules. * **Consumer Electronics:** Hard drives, cameras, and portable media players. ---